New Brass

[alwaltr817]

I just got a some new Winchester brass in 10MM for my new Witness. Should new brass be immediately trimmed or just miked randomly? I also assume it has to be sized, or is it OK as is? Also I plan on using Blue Dot with 175-180 Grain bullets. Any suggestions...Thanks in advance...

 

[M1911]

I guess I'm a slacker, but I've never trimmed my pistol brass...

I use a Dillon 550. The first die does sizing, depriming, and priming. So I always size my brass each time.

 

[Nickle]

Just load it. That's what the factory does.

 

[jhrosier]

I just got a some new Winchester brass in 10MM for my new Witness. Should new brass be immediately trimmed or just miked randomly? I also assume it has to be sized, or is it OK as is? Also I plan on using Blue Dot with 175-180 Grain bullets. Any suggestions...Thanks in advance...

I usually check a few for length. Even new brass can be out of spec.
I always size & expand new pistol brass. It's not much trouble and if the brass is bulk packed, there will probably be a few out of round necks.

 

[Dan S]

Don't bother trimming pistol brass, it gets shorter with use.

 

[Cross-X]

Don't bother trimming pistol brass, it gets shorter with use.

So, unlike rifle brass, that lengthens with use, pistol brass gets shorter? Hmmmmm.

 

[jhrosier]

Don't bother trimming pistol brass, it gets shorter with use.

I've not seen that happen.
Can you give an example?

 

[Dan S]

You have to load it a lot. I have .45 ACP brass that's been fired so many times the headstamp is gone. Those cases are probably .030 short. They still work fine.

 

[TY43215]

I would not bother trimming pistol brass either. Never have and never will.

I have 38spl brass I have been loading since 1975 and it is still within specs. I shoot it until it splits. 45ACP same thing.

I must be a slacker too. As far as shorter goes, as DanS stated usually because of the head stamp and usually from Major PF loads.

Best brass is revolver fired in a moon clip gun. You know where it has been and you always get 99% of it back

Regards,